Preheat your oven to 180°C (350°F) and line a muffin tin with paper liners.
In a large bowl, whisk together the flour, baking powder, sugar, and salt until well combined. This creates an even dry mixture for the batter.
In a separate bowl, whisk the eggs, then add the milk and peanut butter, stirring until smooth and slightly creamy, filling your kitchen with a warm, nutty aroma.
Pour the wet mixture into the dry ingredients and gently fold together with a spatula until just combined; avoid overmixing to keep the muffins tender.
Fold in the chocolate chips, distributing them evenly throughout the batter for delightful pockets of sweetness.
Spoon the batter into the prepared muffin cups, filling each about 3/4 full for a domed top.
Bake in the preheated oven for 20-22 minutes, until the muffins are golden around the edges and a toothpick inserted into the center comes out clean, filling your kitchen with an irresistible peanut aroma.
Remove the muffins from the oven and let them cool in the tin for about 5 minutes, then transfer to a wire rack to cool completely, allowing the tops to crack slightly and develop a beautiful golden hue.
Once cooled, enjoy the muffins warm or at room temperature, with their tender crumb and rich, nutty aroma inviting every bite.